console.log(5&6);
console.log(7|12);
console.log(7^12);
var data = 2100,data1,data2;
data1=data;
data2=data1
data = data%4;
data1=data1%100;
data2 = data2%400;
((data == 0 && data1 !=0) ||data2 ==0) && console.log("shi闰年");
((data == 0 && data1 !=0) ||data2 ==0) || console.log("不是闰年");